Antigone is the subject of a story in which she attempts to secure a respectable burial for her brother Polynices. Oedipus 's sons, Eteocles and Polynices, had shared the rule jointly until they quarrelled, and Eteocles expelled his brother. In Sophocles ' account, the two brothers agreed to alternate rule each year, but Eteocles decided not to share power with his brother after his tenure expired. Polynices left the kingdom, gathered an army and attacked the city of Thebes in a conflict called the Seven Against Thebes. Both brothers were killed in the